| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000028LVL |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: NETWORKING: LIN COMMUNICATION SYSTEM: B120687,B127387,B232187-B232487; P/W Master SW System Missing Message; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] | ||
|
DTC |
B120687 |
P/W Master SW System Missing Message |
|
DTC |
B127387 |
Sliding Roof System Missing Message |
|
DTC |
B232187 |
D-Door P/W System Missing Message |
|
DTC |
B232287 |
P-Door P/W System Missing Message |
|
DTC |
B232387 |
RR-Door P/W System Missing Message |
|
DTC |
B232487 |
RL-Door P/W System Missing Message |
DESCRIPTION
This DTC is stored when LIN communication between the main body ECU (multiplex network body ECU) and multiplex network master switch assembly, power window regulator motor assembly (driver door), power window regulator motor assembly (front passenger door), power window regulator motor assembly (rear RH door)*2, power window regulator motor assembly (rear LH door)*2 or sliding roof ECU (sliding roof drive gear sub-assembly)*1 stops for 10 seconds or more.
- *1: w/ Sliding Roof System
- *2 :w/ Rear Seat
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
|---|---|---|---|---|
|
B120687 |
P/W Master SW System Missing Message |
No communication between multiplex network master switch assembly and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
Main Body |
|
B127387 |
Sliding Roof System Missing Message |
No communication between sliding roof ECU (sliding roof drive gear sub-assembly) and main body ECU (multiplex network body ECU) for 10 seconds or more.*1 |
|
Main Body |
|
B232187 |
D-Door P/W System Missing Message |
No communication between power window regulator motor assembly (driver door) and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
Main Body |
|
B232287 |
P-Door P/W System Missing Message |
No communication between power window regulator motor assembly (front passenger door) and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
Main Body |
|
B232387 |
RR-Door P/W System Missing Message |
No communication between power window regulator motor assembly (rear RH door) and main body ECU (multiplex network body ECU) for 10 seconds or more.*2 |
|
Main Body |
|
B232487 |
RL-Door P/W System Missing Message |
No communication between power window regulator motor assembly (rear LH door) and main body ECU (multiplex network body ECU) for 10 seconds or more.*2 |
|
Main Body |
- *1: w/ Sliding Roof System
- *2 :w/ Rear Seat
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
When a power window regulator motor assembly is replaced or removed and reinstalled, it is necessary to perform initialization.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ]; WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: REGISTRATION](/t3Portal/stylegraphics/info.gif)
-
When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it is necessary to perform initialization.*
Click here
- *: w/ Sliding Roof System
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*
for HV Model: Click here
for Gasoline Model, except TMMMS Made: Click here
- *: w/ Smart Key System
PROCEDURE
|
1. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
|
|
2. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Main Body > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC B120687, B127387, B232187, B232287, B232387*3 and B232487*3 are output*1 |
B |
|
DTC B120687, B232187, B232287, B232387*3 and B232487*3 are output*2 |
C |
|
DTC B120687, B232187, B232287 and B232387*3 are output |
D |
|
DTC B120687, B232187 and B232387 are output*3 |
E |
|
DTC B120687 and B232187 are output |
F |
|
Only DTC B120687 is output |
G |
|
Only DTC B127387 is output*1 |
H |
|
Only DTC B232187 is output |
I |
|
Only DTC B232287 is output |
J |
|
Only DTC B232387 is output*3 |
K |
|
Only DTC B232487 is output*3 |
L |
- *1: w/ Sliding Roof System
- *2: w/o Sliding Roof System
- *3: w/ Rear Seat
| A |
|
| C |
|
| D |
|
| E |
|
| F |
|
| G |
|
| H |
|
| I |
|
| J |
|
| K |
|
| L |
|
|
|
3. |
INSPECT POWER DISTRIBUTION BOX ASSEMBLY |
|
*a |
Component without harness connected (Power Distribution Box Assembly) |
- |
- |
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Disconnect the 8H and 8A power distribution box assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
HINT:
This inspection is to check the LIN communication line in the power distribution box assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
MB-15 (LIN2) - 8H-11 |
Always |
Below 1 Ω |
|
MB-15 (LIN2) - 8A-15 |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
|
4. |
INSPECT POWER DISTRIBUTION BOX ASSEMBLY |
|
*a |
Component without harness connected (Power Distribution Box Assembly) |
- |
- |
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Disconnect the 8H power distribution box assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
HINT:
This inspection is to check the LIN communication line in the power distribution box assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
MB-15 (LIN2) - 8H-11 |
Always |
Below 1 Ω |
| NG |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY) |
(a) Disconnect the L7 multiplex network master switch assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
8H-11 - L7-17 (LIN1) |
Ignition switch off |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)) |
(a) Disconnect the 8H power distribution box assembly connector.
(b) Disconnect the K2 power window regulator motor assembly (front passenger door) connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
8H-11 - K2-9 (LIN) |
Ignition switch off |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)) |
(a) Disconnect the 8H power distribution box assembly connector.
(b) Disconnect the M2 power window regulator motor assembly (rear RH door) connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
8H-11 - M2-9 (LIN) |
Ignition switch off |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
8. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY) |
(a) Disconnect the 8H power distribution box assembly connector.
(b) Disconnect the L7 multiplex network master switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
8H-11 - L7-17 (LIN1) |
Ignition switch off |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
9. |
CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - AUXILIARY BATTERY AND BODY GROUND) |
(a) Disconnect the L7 multiplex network master switch assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L7-11 (B) - L7-12 (GND) |
Always*1 Ignition switch off*2 |
11 to 14 V |
- *1: for Gasoline Model
- *2: for HV Model
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L7-12 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
10. |
INSPECT POWER DISTRIBUTION BOX ASSEMBLY |
|
*a |
Component without harness connected (Power Distribution Box Assembly) |
- |
- |
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Disconnect the 8A power distribution box assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
HINT:
This inspection is to check the LIN communication line in the power distribution box assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
MB-15 (LIN2) - 8A-15 |
Always |
Below 1 Ω |
| NG |
|
|
|
11. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)) |
(a) Disconnect the T29 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
8A-15 - T29-7 (MPX1) |
Ignition switch off |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
12. |
CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) - AUXILIARY BATTERY AND BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T29-1 (B) - Body ground |
Always*1 Ignition switch off*2 |
11 to 14 V |
- *1: for Gasoline Model
- *2: for HV Model
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T29-2 (E) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
13. |
INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
|
(a) Remove the multiplex network master switch assembly. Click here
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L7-17 (LIN1) - L7-16 (LIN2) |
Always |
Below 1 Ω |
| NG |
|
|
|
14. |
CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)) |
(a) Disconnect the L2 power window regulator motor assembly (driver door) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L7-16 (LIN2) - L2-9 (LIN) |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
15. |
CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR) - AUXILIARY BATTERY AND BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L2-2 (B) - Body ground |
Always*1 Ignition switch off*2 |
11 to 14 V |
- *1: for Gasoline Model
- *2: for HV Model
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L2-1 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
16. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)) |
(a) Disconnect the 8H power distribution box assembly connector.
(b) Disconnect the K2 power window regulator motor assembly (front passenger door) connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
8H-11 - K2-9 (LIN) |
Ignition switch off |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
17. |
CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR) - AUXILIARY BATTERY AND BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K2-2 (B) - Body ground |
Always*1 Ignition switch off*2 |
11 to 14 V |
- *1: for Gasoline Model
- *2: for HV Model
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K2-1 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
18. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)) |
(a) Disconnect the 8H power distribution box assembly connector.
(b) Disconnect the M2 power window regulator motor assembly (rear RH Door) connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
8H-11 - M2-9 (LIN) |
Ignition switch off |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
19. |
CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR) - AUXILIARY BATTERY AND BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M2-2 (B) - Body ground |
Always*1 Ignition switch off*2 |
11 to 14 V |
- *1: for Gasoline Model
- *2: for HV Model
(b) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M2-1 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
20. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)) |
(a) Disconnect the 8H power distribution box assembly connector.
(b) Disconnect the N2 power window regulator motor assembly (rear LH door) connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
8H-11 - N2-9 (LIN) |
Ignition switch off |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
21. |
CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR) - AUXILIARY BATTERY AND BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
N2-2 (B) - Body ground |
Always*1 Ignition switch off*2 |
11 to 14 V |
- *1: for Gasoline Model
- *2: for HV Model
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
N2-1 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|